Shepherding the Sea: Dr. Reese Halter

Conservation biologist Reese Halter, whom you might know from YouTube or MSNBC or the Australian Broadcasting Corporation, writes books that revel in the wonder of nature. But in his newest book, Shepherding the Sea: The Race to Save Our Oceans, Dr. Halter has gone past wonder to take the offensive, arguing vociferously that a collapse of ocean ecology threatens all life on Earth.